Izvorni znanstveni članak
Influence of Polymerization Light Intensity on the Polymerization Shrinkage of Composite Materials (Part III)
Alena Knežević
Nazif Demoli
Zrinka Tarle
Višnja Negovetić Mandić
Sažetak
Composite materials shrink during the polymerization process which lessens their clinical value. Modifications of composition of the composite material and application technique proved inadequate for compensation of polymerization shrinkage, and therefore modification of polymerization modes was attempted. The polymerization modes of lower intensities will enable prolongation of the pre-gelation phase and consequently greatly decrease the total amount of shrinkage. The purpose of the study was to determine the polymerization shrinkage of Tetric Ceram (Vivadent, Schaan, Liechtenstein) and Filtek Z 250 (3M/ESPE Dental Products, St Paul, MN) composite materials by digital holographic interpherometry. Samples of the composite material were polymerized by three modes of various intensities (medium, exponential and standard) Elipar Trilight halogen curing unit (3M/ESPE, Seefeld, Germany). Highest values of the polymerization shrinkage were recorded for the polymerization mode with highest light intensity.
Ključne riječi
composite materials; polymerization shrinkage; digital holographic interpherometry; halogen curing unit
Hrčak ID:
10002
URI
Datum izdavanja:
15.1.2006.
Posjeta: 2.030 *